Tooth



yUNITED sTATEs PATENT oEEicE.

SHARPLESS CLAYTON, OF WEST CHESTER, PENNSYLVANIA.

TOOTH.

Specification of Letters Patent No. 12,156, dated January 2, 1855.

T0 all whom t may concern:

Be it known that I, SI-IARPLEss CLAYTON, of West Chester, in the county of Chester and State of Pennsylvania, have invented a new and Improved Method of Securing Porcelain Teeth to Metallic Plates; and Ido hereby declare that the following is a full, clear, and exact descriptionl of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1, is a plan view inverted with the plate removed. Fig. 2, is a sectional view. Fig. 3 is a section through the line x FiO. 2.

Like letters'refer to like parts in the different views.

The nature of my invention consists in an improved method of securing porcelain teeth to metallic plates.

To enable others skilled in the arts, tor

make and use my invention, I will proceed to describe the process of making and using it. f i

The teeth are mounted on a plate prepared in the usual way, by means of wax, to fill up all crevices, then they are inverted, and a second cast of plaster is made to form the two molds; then the two casts are separated and the plate and wax removed. Then three gates are made through the lower mold at the base of the teeth, through which the metal is poured. Said metal consisting of chemically pure tin; when the metal is coo-l the molds may be separated, and the plate and teeth removed, and finishedin the Ordinary Way, Y

The teeth and gums are formed of solid porcelain, and are provided with a dovetail groove A which extends around the base of the teeth as seen in Fig. l into which the dovetail flange B, takes as seen in Fig. 2. I also form holes seen in Fig. 1, in the teeth, which are lled with pins as seen in Figs. l, 2, said flange and pins being cast into the groove A by the above described process.

The teeth may be attached to silver, gold, or metallic plates of any kind by casting the flange B of tin and at the same time uniting it with the plate.

Having thus described my process of securing porcelain teeth to metallic plates, what I claim as my invention and desire to secure by Letters Patent is- The dovetail grooves formed in the base of the teeth and the holes through the teeth, saidgroove and holes to be filled with pure tin, cadmium or any other fusible metal so as to form a dovetail flange and pins as described for the purpose of securing the teeth and gums to metallic plates, as4 herein set forth and described.

In testimony whereof, I, the said SHARP- LEss CLAYTON hereto subscribe my name in the presence of the witnesses whose names are hereunto subscribed, on the 25th day of May A. D. 1854.

SAMUEL MONAGHAN, HENRY FLEMING. 

